Definition
A ledger is an ordered accounting record of value-changing events, balances, and references used to reconcile an account or distributed system.
In market context
A platform ledger can record deposits, withdrawals, fees, trade results, interest, rewards, penalties, and corrections as separate entries. The running balance should be reproducible from those events, while portfolio valuations may add changing market prices outside the cash ledger. In a distributed ledger, copies of records are coordinated across participants under protocol rules rather than maintained solely by one database owner.
Source
Use the primary source for fuller regulatory or market context.
